package com.fengxing.ams.pub.util;

import java.net.InetAddress;
import java.util.Calendar;
import java.util.Date;

import org.apache.commons.lang3.time.DateFormatUtils;

public class UUIDGenerator {
 
    private static final int IP;
 
    public static int IptoInt(byte[] bytes) {
        int result = 0;
        for (int i = 0; i < 4; i++) {
            result = (result << 8) - Byte.MIN_VALUE + (int) bytes[i];
        }
        return result;
    }
 
    static {
        int ipadd;
        try {
            ipadd = IptoInt(InetAddress.getLocalHost().getAddress());
        } catch (Exception e) {
            ipadd = 0;
        }
        IP = ipadd;
    }
    private static short counter = (short) 0;
    private static final int JVM = (int) (System.currentTimeMillis() >>> 8);
 
    public UUIDGenerator() {
    }
    public static int getJVM() {
        return JVM;
    }
    public static short getCount() {
        synchronized (UUIDGenerator.class) {
            if (counter < 0)
                counter = 0;
            return counter++;
        }
    }
    public static int getIP() {
        return IP;
    }
    public static short getHiTime() {
        return (short) (System.currentTimeMillis() >>> 32);
    }
    
    public static String getTime() {
    	return DateFormatUtils.format(Calendar.getInstance(), "yyMMdd");
    }
 
    public static int getLoTime() {
        return (int) System.currentTimeMillis();
    }
 
    public static String format(int intval) {
        String formatted = Integer.toHexString(intval);
        StringBuffer buf = new StringBuffer("00000000");
        buf.replace(8 - formatted.length(), 8, formatted);
        return buf.toString();
    }
 
    public  static String format(short shortval) {
        String formatted = Integer.toHexString(shortval);
        StringBuffer buf = new StringBuffer("0000");
        buf.replace(4 - formatted.length(), 4, formatted);
        return buf.toString();
    }
 
    public static String generate() {
        return String.valueOf(new StringBuffer(36).append(getTime()).append(format(getIP()))
                .append(format(getLoTime()))
                .append(format(getCount())).toString());
    }
    public static void main(String args[]){
    	for (;;)
        System.out.println(format(getHiTime()));
    }
}